Home Wine Grape Varieties Tinto Cao (red) Decanter Staff August 13, 2010 One of the rarest, high quality port grapes grown in the Douro Valley, highly prized for its spicy character. Written by Latest Wine News China removes punitive tariffs on Australian wine Freixenet to produce declassified sparkling as severe drought hits Catalonia Climate change could make 70% of global wine regions unsuitable for grape growing